Rebasing is a procedure that usually needs to be performed when the prosthetic teeth are still in good condition, but the material of the base is not. The old material is replaced by new material while keeping the prosthetic teeth, thus providing stable and more comfortable dentures once again.
Dentures can lose their proper fit due to issues such as bone loss in the mouth or gum reduction (shrinking), which occurs as oral tissue changes. Relining is a more economical alternative to obtaining a new set of dentures. This procedure consists of simply resurfacing the interior part of the dentures to give a better fit with the condition of the gum at the time. With such a procedure, as only the inside portion is being changed, the appearance of your dentures will change by no means.